[igraph] leading.eigenvector.community

[MATSUDA, Noriyuki]

Hello:

  I am using igraph 0.5.1 and now working on  
leading.eigenvector.community() and
  community.le.to.membership().

  1) I want to obtain the largest eigenvalue and the associated  
vectors.  The manual
     says
         eigenvector The eigenvector of the community matrix,
          or NULL if the eigenvector argument was FALSE.
         eigenvalue The largest positive eigenvalue of the  
modularity matrix.
    But, where should I put that argument.  I put eigenvector=T in  
the two functions in vein.
  2) It will be valuable if  leading.eigenvector.community() returns  
the modularity at each
     merge.

Thanks in advance as usual.